Originally Posted by
sentom
IMHO its not worth buying a Y, B or S fare (which you will need) without knowing if you will get the upgrade confirmed. depending where you go there might be C specials which are only slightly more expensive...
SQ is only charging slightly more for B over E - that's different from LH who wants more than twice for B than for regular economy. Agree with the statement though that it's recommended to book B only in cases where upgrades are available unless you are keen on earning more miles.